//index.js
//获取应用实例
const app = getApp()

Page({
  data: {
    item:0,
    tab:0,
    motto: 'Hello World',
    userInfo: {},
    hasUserInfo: false,
    canIUse: wx.canIUse('button.open-type.getUserInfo'),

    playlist:[{
      id:1,title:'动物世界',singer:'薛之谦',
      src:'http://music.163.com/song/media/outer/url?id=468517654.mp3',coverImgUrl:'/images/dwsj.png'
    },
      {
        id: 2, title: '小嫦娥', singer: '安子与九妹',
        src: 'http://music.163.com/song/media/outer/url?id=407759201.mp3', coverImgUrl: '/images/xce.png'
      },
      {
        id: 3, title: '世间美好与你环环相扣', singer: '柏松',
        src: 'http://music.163.com/song/media/outer/url?id=1363948882.mp3', coverImgUrl: '/images/meihao.png'
      }],
      state:'paused',
      playIndex:0,
      play:{
        currentTime:'00:00',
        duration:'00:00',
        percent:0,
        title:'',
        singer:'',
        coverImgUrl:'/images/pikaqiu.jpg',
      },
  },

  audioCtx:null,
  onReady:function(){
    this.audioCtx=wx.createInnerAudioContext()
    this.setMusic(0) //默认选择第一首
  },
  setMusic:function(index){
    var music=this.data.playlist[index]
    this.audioCtx.src=music.src
    this.setData({
      playIndex:index,
      'play.title':music.title,
      'play.singer':music.singer,
      'play.coverImgUrl':music.coverImgUrl,
      'play.currentTime':'00:00',
      'play.duration':'00:00',
      'play.percent':0
    })
  },
  play:function(){
    this.audioCtx.play()
    this.setData({state:'running'})
  },
  pause:function(){
    this.audioCtx.pause()
    this.setData({state:'paused'})
  },
  next:function(){
    var index=this.data.playIndex >= this.data.playlist.length -1?
    0:this.data.playIndex +1
    this.setMusic(index)
    if(this.data.state==='running'){
      this.play()
    }
  },
  onReady:function(){
    this.audioCtx=wx.createInnerAudioContext()
    var that=this
    // 播放失败检测
    this.audioCtx.onError(function(){
      console.log('播放失败：'+that.audioCtx.src)
    })
    //播放完成自动下一曲
    this.audioCtx.onEnded(function(){
      that.next()
    })
    //自动更新播放进度
    this.audioCtx.onPlay(function(){})
    this.audioCtx.onTimeUpdate(function(){
      that.setData({
        'play.duration':formatTime(that.audioCtx.duration),
        'play.currentTime':formatTime(that.audioCtx.currentTime),
        'play.percent':that.audioCtx.currentTime/that.audioCtx.duration*100
      })
    })
    //默认选择第一曲
    this.setMusic(0)
    //格式化时间
    function formatTime(time){
      var minute=Math.floor(time/60)%60;
      var second=Math.floor(time)%60
      return(minute<10?'0'+minute:minute)+':'+(second<10?'0'+second:second)
    }
  },
  sliderChange:function(e){
    var second=e.detail.value*this.audioCtx.duration/100
    this.audioCtx.seek(second)
  },
  change:function(e){
    this.setMusic(e.currentTarget.dataset.index)
    this.play()
  },
  
  changeItem:function(e){
    this.setData({
      item:e.target.dataset.item
    })
  },
  changeTab:function(e){
    this.setData({
      tab:e.detail.current
    })
  },

  //事件处理函数
  bindViewTap: function() {
    wx.navigateTo({
      url: '../logs/logs'
    })
  },
  onLoad: function () {
    if (app.globalData.userInfo) {
      this.setData({
        userInfo: app.globalData.userInfo,
        hasUserInfo: true
      })
    } else if (this.data.canIUse){
      // 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回
      // 所以此处加入 callback 以防止这种情况
      app.userInfoReadyCallback = res => {
        this.setData({
          userInfo: res.userInfo,
          hasUserInfo: true
        })
      }
    } else {
      // 在没有 open-type=getUserInfo 版本的兼容处理
      wx.getUserInfo({
        success: res => {
          app.globalData.userInfo = res.userInfo
          this.setData({
            userInfo: res.userInfo,
            hasUserInfo: true
          })
        }
      })
    }
  },
  getUserInfo: function(e) {
    console.log(e)
    app.globalData.userInfo = e.detail.userInfo
    this.setData({
      userInfo: e.detail.userInfo,
      hasUserInfo: true
    })
  }
})
